| 张 阳,陈嘉其,王嘉伟,彭友文.局部减薄水电站光面管失效模式研究[J].江西水利科技,2020,(5): |
| 局部减薄水电站光面管失效模式研究 |
| Investigation on failure mode of plain penstocks with local wall-thinning |
| |
| DOI： |
| 中文关键词: 失效模式判定 弹塑性增量法 水电站光面管 局部减薄 几何参数 |
| 英文关键词: Failure mode determination Elastic-plastic incremental analysis Plain penstock Local thinned defect Geometric parameters |
| 基金项目: |
|
| 摘要点击次数: 469 |
| 全文下载次数: 413 |
| 中文摘要: |
| 为了得出局部减薄水电站光面管失效模式判定方法，开展了该类管道失效机理研究.结合试验结果验证了本文失效分析方法的可靠性，选取局部减薄管道与相应无缺陷管道失效时塑性区体积比为失效模式量化指标，建立了管道失效模式与局部减薄几何参数的对应关系.结果表明：采用中高强度钢材的光面管跨度和局部减薄环向长度对减薄管失效模式的影响可忽略；局部减薄厚度不大于0.5倍壁厚时，采用中高强度钢材的光面管失效模式仅由局部减薄厚度控制，否则光面管失效模式由局部减薄厚度和局部减薄轴向长度共同控制. |
| 英文摘要: |
| In order to obtain the method for the failure mode determination of plain penstock with local wall-thinning，the failure mechanism of plain penstock with local wall-thinning was investigated.Firstly，the reasonability of the failure analysis method was proved based on the experimental data.Then，the volume ratio of plastic regions for plain penstock with local wall-thinning and intact penstock was selected as the quantitative index of failure mode.The relationship between the local thinned geometric parameters and the failure mode determination was proposed.The results show that the structural span and local thinned circumferential length have little influence on failure mode.It also indicates that when the local thinned thickness is no more than 0.5 times of the wall thickness，the control parameter of penstock failure mode is the local thinned depth，otherwise，the failure mode is controlled by both the local thinned depth and the local thinned axial length. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
